'Sign on Your Hand' in the Bible

So it shall serve as a sign on your hand and as phylacteries on your forehead, for with a powerful hand the Lord brought us out of Egypt.”

You shall bind them as a sign on your hand and they shall be as frontals on your forehead.

“You shall therefore impress these words of mine on your heart and on your soul; and you shall bind them as a sign on your hand, and they shall be as frontals on your forehead.